can you do things with this? >> yes, there are ways to use it to buy and sell >> stephen: what are people buying mostly with it? >> drugs, credit cards. illegal >> stephen: you can buy drugs now though? what's the value of buying drugs with bit-coin. >> for someone who wants to do something shady or someone who is just a fanatic apt eye government libertarian is there's no way to track you. if you use your credit card online they can figure out who you are. >> stephen: no one buys drugs with a credit card, n. like $20. you know, no one is tracing that, you know, nothing, you know, tune in. cash is untraceable. >> cash is untraceable but you do have to meet people. today i wanted to buy bit-coins so i can tell you what it was like. and what i found was a guy named trader 675 was willing to meet me for cash so there would be no traceable, you know, no credit card transaction >> stephen: you're on the n.p.r.